Gearing mechanism



May 6, 1930.

2 Sheets-Sheet l May 6, v1930. H. A. TUTTLE 1,757,026

' GEARING MECHANISM Filed April 4,l 192'! 2y sheets-sheet 2 Patented May 6, 1930 UNITED: STATES; vPafifela'rvolf-151er:

HENRY A. TUTTLE, onUPToiv, MASSACHUSETTS; Y.'Jriiiivrn L. TUTTLE EXECUTRIX or sain HENRY A. TUTTLE, nncnasnn f .d d. 1

' driving shaft is usually the engine shaft and GEARING Mechanism] Appnation meaAprn-a, 1927.

This invention relates to gearing mechanism of the type Vhaving clutching mechanism to connect av driving and a driven shaft directly together Afor forward drive and gear@ ing to connectthe shafts for the reverse drive of the driven Shaft. The gearing mechanism is especially adapted, although not `necessarily limited, to boat propulsion wherein the the kdrivenshaft usually is, or is connected with, the propeller shaf 'd An obj ect of this invention is the provision ofclutch mechanism to connect the driving and driven shafts positively together for for- Ward drive and to eliminate the usual fric-l tionclutch heretofore employed in marine propulsion for this purpose. I A further object of the inventionv is the provision of clutch mechanism, and prefer;-Y

ably positive clutch 1nechanism,to connect the reverse gearing with one of' said shafts as the `driving sharm-to condition the gearingfor the reverse drive of thedrivenshaft.V

VA yet further object of the invention is operating mechanism for both clutchmechaf nisms so arranged that in one` position thereof it holds both clutch mechanisms ininoperative position so that the driving and driven shafts are free, from positive interconnection, and also so arranged that' movement of the operating mechanism in kopposite directions from the aforesaid position serves to operate each mechanism separately. v l Y A yet further object of the invention is an improved form of positive clutch Vmechanism. l

Another obj ect is generally to improve the construction and operation of gearingmechanisms.- i, i

VClaims'drawn more specifically tol the arrangement of the clutch mechanism `are coni tained in my concurrently filed application Fig. 1 is aside elevationof the gearing mechanism enibodyingthe invention partly in section with Fig; Fig. 1.

parts not essential to the in-V vention omitted.

serial No. 180,702.

Fig.V .4, is an end view of the cover plate for the clutch mechanism. rf

Fig. is a. perspective View of sleeve or cylinder.

Fig. 6 ris a perspective view of one of 'the'V clutch dogs. x f 9' f- Y As here shown, the gearing mechanism embodying this invention includes a drivingshaftlO and driven shaft 12 which'is aligned with the driving. Shaft.V Both of said shafts aresuitably supported inbearings 14. A propeller shaft` 16 is disposed beneath-and in parallel relation with the' driven shaft and isconnected therewith throughsuitable gears Y 18 fixed tcsaid driving and propeller shafts.

T he clutch Amechanism for connecting the drivingand driven-shafts positively-together y Y for-conjoint rotation inthe same direction ofthe drivenshaftby a lrey 22.v Said hub is provided witharadially outstanding flange,

includes a hub 20Whi'ch is fixed to theend A 24, against the left end face of which isrdis-` poseda spur gear;26. A circular cover plate ing shaft by a key 36. Said cylinder is pro- 1 vided with fa plurality of notches 38, see Figs. 3 and-5, .which are" spaced equi-distant in and'about the outer periphery. thereof.

Said notches .are adapted to be entered by clutch or locking dogs carried by the gear 26 whereby to'connect Vsaid cylinder positivelyv With said gear'26 and thereby to directly con- Y nectV said drivingand driven shafts positively togetherfor conjoint rotation in the Same directon. j-

Saidgear 26 is provided with a pair of clutch dogs, see Figs.,3 and 6. which are I received in opposed recesses 40 inthe inner face 'of said gear.,A Eachl clutch dog comprises an arm 42 which has a semi-circular end face or abutment le that is adapted to Y be received within a correspondingly shaped portion 46 of the recess 40 in said gear to have a pivotal or rocking bearing connection therewith. Said arm is provided withV a cylindrical extension 48 at one side, which is a continuation, in part, of said -semicircular face 44. Said extensionV is journalled in an aperture in the flange 24, which extension, in combination with the cylindrical extension 48 provides a pivotal or rocking support for tlie'clutch dog. Said arm'42 at its free end is provided with the jaw orabutment which extends below said arm 42 and is adapted, when `one of the notches 38 in the cylinder 34 is disposed thereheneath, to enter the notch in the manner indicated in Fig. 2

r and thereby positively to connect said cylinfil@ der and gear. VT he lowerface 52 of said jaw y is arcuate in form to conform with the cylin drical face of said cylinder k34 so that when the dog'is disposed Ventirely wlthln its recess in said gear, 1t 1s free from lengagement with said cylinder and the cylinder can rotate independently Vof said gear. The' lateral -face 54of said jaw is arcuate in form and the correspondingfface of the recess 40 is correspondingly shaped so that the dog,

a both dogs are provided withrlateral exten? while movable in said recess, cannot move materially lengthwise thereof. d The arm 42 of said dog is approximately the width of the gear so that the flange 24 and cover plate '28'.cooperate to hold the.l dog in its recess against lateral displacement. The jawsv of sions 58 which extendfreely through aper# tures 60 in the cover plate andare adapted to be engaged b y operating mechanismhereinafter to be described tol control the clutch operation. Said dogs are adapted to be urged constantly in a clutch engaging direction and,l for this purpose, said cover plate 28 is formed with opposed bosses 62 therein aligned with the apertures 60 and -extended axially of the plate. Said bosses are provided with internal passages 63 therein in which compression springs 64 are received. The

outer ends of said springs bear against plugs 66 which are. screw-threaded removably in said passages and the inner ends of said springs bear against pin 68 which engage the j a\v-extensions 58ofthe dogs whereby constantly tourge said dogs inwardly for engagement'withthe cylinder 34 ofthe drivying shaft. It will be seen` that when said dogs are held from `engagement with the cylinder 34 of the driving shaft, as illust-rated in Fig. 3, the drivingv and driven shafts are free from positive connection and hat when restraint on said dogs is removed said springs 64 are free to urge said dogs inwardly and, when notches'38 in the cylinder 34'are properlyY aligned with the jaws of said dogs, tocause said` dogs to enter said notches thereby to eect the-positive locking engagement of said driving and driven shafts. The driving pressure is adapted to be against the faces 54 and 44 of said dogs.

Gearing mechanism and clutch mechanism Y similar to the abovedescribed lmechanism are provided to connect said driving and driven shafts .for reverse drive. To this end, a cylinder 34a.- similar tothe cylinder 34 is respects the saine, so that. it need not be further described. n y

Reverse ydrive is transmitted fromthe gear 72 to the driven shaft through atransmission shaft 78 which is parallel with said driving and driven shafts. A spur gear 80 is fixed to said driven shaft and is in constant'mesh with'the gear 72. A smaller spur gear 82 is ixed to said transmission shaft adjacent the gear 26 of the. drivenV shaft but out of mesh therewith. Said gear 82 is in constant mesh with an idler or reversing gear 84 carried by shaft 86k and said reversing gear is in con# stant mesh` with the gear 26 of said Adriven shaft; It is apparent that, when the reverse. 'drive clutch Vmechanism is actuated to connectthe *gear 72 ositively withV the driving 'fixed to the driving shaft by a key 70.` A Y shaft, with the. irect-drive clutch free, the i drive will be transmitted through the transmission shaft and the reversing gear'84 to rotate the driven shaft in the opposite direction to thei rotation of the driving shaft.

The operating mechanism for said direct and reverse drive clutch mechanisms includes a sleeve 90 which is freely rotatable and slidable on said driving shaft and is disposed between said clutch mechanisms. `Said sleeve is adapted lto be moved axially along said shaft bymeans including a pivoted operating lever 92which is engageable Iwith said sleeve intermediate its ends in a more or less common manner. Said sleeve is provided with cylindrical endl portions l94 and 96that are adapted to engage the end arcuate faces of the projections 58 of the. clutch dogs and to hold said dogs out of clutching engagement with the drivingrlshaft.y The ends of said sleeve are conical as at98 forthe purpose of engaging. said' dogs a'iidmovingthem outwardly out of driving position as said sleeve is moved., axially. The length of said sleeve 90 is adapted to be such that when it is in one ext-reine position, it holds the dogs of one clutch mechanism free from-driving position and just` clearsthe dogs` of the other clutch mechanism so c that the driving position by their` respective springs.

The sleeveis also so arranged that when it is in mid position, it is in engagement with Vthe dogs of both clutch mechanisms and holds both clutches in Atheir disengaged positions so that the driving and driven shafts are free v Vwill'be held in full `permitting the shafts to rotate independently of each other.

In testimony whereof, I'have signed my Y:

name to this specification. f HENRYA A..TUTTLE. I

from positivedriviiig connection and the j mechanism thereby is in neutral position."

Movement of the sleeve in opposite directions -from the neutral position Veffects the disengagement of the clutch mechanism toward which the sleeve is moved. In the position of the mechanism.A illustrated in Fig. 1, the forward drive clutch mechanism isin disengaged position whilethe reverse drive clutch mechanism is in'reverse position and the drive and` sleeve, a second gear surrounding said is through the transmission shaft to the gear 26' on the driven shaft and in a direction to reversely rotate the Adriven shaft. When the Y i sleeve 90 is moved to Vits extreme left hand i position, the reverse drive clutch mechanism isdisengaged and the forward drive clutch mechanisniis set to couple theY shafts directly -and excludeL the gearing` for forward drive mechanism. c v

I claim: v Reversing mechanism comprising the combination of aligned driving `and driven shafts, a transmission sha-ft parallel with lthe aforesaid shafts, a pair of axially spaced sleeves 'on ,and fixedY tosaid driving shaft', a-loose gear l surrounding one of said sleeves,reversedrive clutchniechanism establishing a disengageable driving connection between lsaid gear other sleeve and fixed to saidV driven shaft, forwardediive clutch mechanism establishing a Vdisengageable driving connection, between saidflast gear and driving shaft, gears fixed vto said transmission shaft connectedfwith kthe aforesaid gears,- a reversing gear `meshing with, said second gear and withV one of said transmission shaft gears, saidclutch mecha-V nisins both having clutch dogs which rockin axially-extended passages ink said gearsand i i 95 y lit in notches in said sleeves to connect said l gears and sleeves, housing plates overlyingV the opposite sides of bothv gears and constitutnig means to retain said dogs in operative `position in said passages in said gears, said 'V which extend looselythroughl the Vconfronting ones of said housing plates toward theV A other clutch mechanism and overlie and are spaced from said driving shaft, and a collar .slidable on said shafty between said sleeves `dogs of each clutch mechanismhaving arms sof 

